.product{
    width: 1200px;
    height: 800px;
    margin: auto;
    border: 1px solid silver;
}
.product-nav{
    height:50px;
    width: 1200px;
    border: 1px solid blue;
}
.product-nav div:first-child{
    color: #e69137;
    font-size:20px;
    line-height: 50px;
    text-indent:10px;
}
.product-nav li{
    list-style: none;
    float: right;
    height: 50px;
    width: 100px;
    color:black;
    background-color:#f3f3f3;
    line-height: 50px;
    text-align: center;
}
.product-nav ul li:hover{
    background-color: #e69137;
}
.product-top{
    width: 1200px;
    height:350px;
}
.product-img{
    margin: 40px;
    float: left;
}
.product-name{
    margin: 50px 0 0 0;
}
.product-name h4{
    color: #e69137;
}
.product-name p{
    text-decoration: line-through;
}
.product-name div span{
    color: #e69137;
    font-weight: bold;
    font-size:25px;
}
.product-content-title{
    margin:20px;
    border: 1px solid silver;
    background-color: #f3f3f3;
    width:1160px;
    height: 50px;
    line-height: 50px;
    text-indent: 5px;
}
.product-content h3{
    text-indent: 4em;
}
.product-content span{
    font-weight: normal;
}
.product-last{
    margin: 20px;
    font-size: 20px;
}
.product-last div{
    color:silver;
}
.product-last span{
    color: black;
}